Theology is doctrine concerning the essence and will of God and his kindnesses shown to the human race on account of Christ the Mediator, and the worship owed to him in turn–[a doctrine] revealed in the Word of God that was handed down by the Prophets and Apostles and confirmed by the manifest testimonies of miracles, through which [doctrine] God is truly efficacious and imparts true knowledge of himself, the remission of sins, and eternal life to those who believe. 1